Category Archives: Science and Edumacation

Science and Edumacation

Arguments Against the Paleo Diet

This video makes some fantastic points about the so-called “paleo diet”:

This post, which I wrote months ago, was originally much longer and incorporated many of the points Dr. Zuk makes, in particular my belief that evolution proceeds in a haphazard random way and does not necessarily lead to some supreme state.

She also puts some science behind the principle objection I have always had: that there is unlikely to be some idyllic point X at which our diet was perfectly suited to our physiology then and forever more. We have evolved with our diet. Our diet has been evolving since we were primordial slime. Claiming that our ancestors’ diet at some time X — even making the huge assumption that we know what our ancestors ate at point X — is arbitrary. Why go back to that point? Why not go back to the time when we were primordial slime eating protozoans?

Moreover, how do we know that our ancestors were eating the right foods in the first place? That’s a gigantic assumption to make based on what we know about evolution. Isn’t it possible that their paleo diet was actually bad for them? That they only ate it because they had no choice in the matter? That our technology and diet has evolved toward something better suited to us?

All that having been said, I’m not slamming the paleo diet, per se. Some people seem to have improved their health with it and I’ve found that cutting carbs benefits me. I do think the current received wisdom of cutting fat and protein and emphasizing carbs is not nearly as supported by the science as our government likes to pretend it is. But let’s not swing the pendulum too far back and pretend that the paleo diet has more science behind it. Or that any one-size-fits-all diet is appropriate. I think the point to take away is that diet is a lot more complex and a lot less well understood than we would like.

'Culture', Politics, Science and Edumacation

Big Damn Linkorama

It’s been a while and I’ve been accumulating links. You’ll have to forgive me if I ramble on a bit.

  • This article, about the potential for solar-powered roads, reminded me of Robert Heinlein’s The Roads Must Roll. But I am deeply skeptical that the kind of durable materials could be manufactured in the quantities needed. When people talk about alternative energy, they never seem to take into account the expense — financial and environmental — of manufacture and maintenance.
  • See, I told you Christopher Ryan was full of shit. He writes about our bleak future with sexbots taking over (or something). But Maggie McNeill — who knows a thing or two about sex — has frequently pointed out that people want intimacy for sex, not just pleasure. And a device capable of reproducing that would have rights of its own. Masturbation doesn’t cut down on the amount of sex people have. And I also haven’t noticed that the proliferation of dildos, vibrators and fleshlights has remotely cut down on the amount of sex going on (and reminder, dildos date back thousands of years). We have sex for intimacy as well as pleasure.
  • An impressive study reveals the age of the Iliad. Seems it was written about four or five centuries after the events.
  • This study disputes the idea that people’s political preferences change with age. You can clearly see that Democratic/Republic preferences are often based on who was in charge when the voter came of age. This doesn’t surprise me at all. As you can see in the graphs, Roosevelt, Kennedy, Reagan, Ford, Bush I, Clinton, Obama and Ike were respected and made lifelong supporters. Truman, Johnson, Carter, Nixon, and Bush II were hated and made lifelong opponents. I knew teachers who would never vote Republican because of Nixon. And I know people who will never vote Democrat because of Carter. It will be interesting to see how history judges Obama. I suspect he will create more lifelong supporters than opponents.
  • The opposition to GMO’s grows ever more absurd. We now have a golden rice that could literally save millions per year. And the opposition to them is increasingly based on lies and distortions.
    • Science and Edumacation

    Boobs Again

    1 Comment

    In a rather grammatically- and stylistically-challenged article, the Atlantic talks about the latest study:

    Viren Swami and Martin Tovée at the Universities of Manchester and Newcastle, respectively, look into the intricate world of why physical ideals are ideals, and in turn why they drive people beyond reason and morality in the current Archives of Sexual Behavior.

    Stylistic note: this lead make it sounds like the study is unique. But I’m guessing that the Archives of Sexual Behavior have published dozens if not hundreds of articles on why physical ideals are ideals. Indeed, the abstract says as much. So why are we talking about this one in particular? Is it the best done so far? I’m going to make the case below that it isn’t even close. What we’re about see is what I call the Scientific Peter Principle: poorly designed studies usually have the most attention-getting results.

    (Also, do ideals drive people beyond reason and morality? That’s an awfully loaded statement.)

    The problem is primal, so the research methods are not to be outdone. 361 white British men were “taken to a quiet private location” to look at women. Not real women; 3D computer renderings. The men were allowed to rotate them 360 degrees. The only difference among the women was breast size.

    The men were then asked to “make their ratings on a paper-and-pencil survey.”

    Emphasis mine. “Not to be outdone”? I can think of about a dozen ways I could outdo this study.

    Swami and Tovée compared the results with the men’s preferences in breast size, which showed that “men who more strongly endorsed benevolently sexist attitudes toward women, who more strongly objectified women, and who were more hostile toward women idealized a large female breast size.”

    The study’s abstract, which is all I have access to, is rather stunning in its lack of humility. After noting that previous studies have been ambiguous, they boldly proclaim their results and then say:

    These results were discussed in relation to feminist theories, which postulate that beauty ideals and practices in contemporary societies serve to maintain the domination of one sex over the other.

    Even if we were to accept the conclusions of this article — and I don’t — it’s a long way from there to beauty ideals maintaining the domination of one sex over the other. Would you like some science with your ideology? Actually, we don’t even need to go to the abstract to see the boldly stated ideological bias. The title is: “Men’s Oppressive Beliefs Predict Their Breast Size Preferences in Women”.

    So, yeah.

    You probably know that I’m not going to be sympathetic to this and not just because of my distaste for ideology. In my previous post, I stated my hypothesis that the breast fetish is just like any other fetish — something that the male mind has latched onto as a way of identifying potential mates. It’s commonality is simply because of its obviousness — visible breasts are the easiest way to identify the female of our species. It’s not a social construct, per se. It is a preference that arises within a social construct. If it weren’t breasts, it would be something else (and almost always is). But the key point here is that fetishes are not really chosen. They just happen. It’s just something that, on a very primal level, the human sexual id locks onto.

    Still, even without my prior assumptions and biases, we can easily see that this study, which has now been widely cited by various mainstream sites (and not just because they like to talk about breasts), has some big problems.

    First, the study was of 361 men. 361 men who were willing to be taken to a “private, quiet location”. 361 whose age, employment and marital status is not exactly clear. That’s an awfully small and demographically narrow number to be drawing conclusions from.

    Second, if the 3D drawing in the Atlantic article is an accurate reproduction of what they were shown, this wasn’t a reasonable test at all. I hate to break this to the authors, but the average bust size in the Western World is quite large and increasing: at least a 36C by old standards and probably larger if the lamentations of bra fitters are to be believed. This is partly rising obesity, marginally because of implants and mostly for reasons that aren’t really clear. This has had a significant effect on the landscape in that men’s perception of what constitutes a big bust has changed. Looking at the figures, even the last one didn’t really cross me as “very large”. Were these informed by some statistical survey of women’s breasts sizes? That’s one way you could improve this “not to be outdone” study.

    There’s a related issue of body type. Critics of male sexuality often claim that men want big breasts on skinny bodies. Certainly, there is a subset of men who like that but most men who prefer busty women actually prefer curvy women. They like big hips and curvy backsides just as much as they like big breasts. Asking these men to look at 3-D computer models — frankly, none of which look like a real woman — is problematic at best.

    (Aside: as I argued in my previous blog, male preferences are not monopolar. All things being equal, a man may prefer a woman with bigger breasts. But in the real world, things are rarely equal. He may be fine with a woman with smaller breasts if she has other features he finds attractive — enchanting eyes, a warm smile, a slender frame, beautiful hair. And — this is a critical point — if a man likes a woman, finds her interesting, enjoys her company — he will begin to see her as attractive. She will become beautiful to him. He will see the beauty in her even if there really isn’t that much to see on an objective level.

    I would posit that there are very few men who date or are attracted to women entirely on bust size. Their preference in models and pornography — situations in which there is no interaction — may reflect a preference (although even then there is probably a broad range). But their behavior in real life can be wildly at variance with this. I would bet you that a significant fraction of the men who preferred “very large” breasts are dating or married to skinny women. And I would bet that some of the men who preferred “very small” breasts are dating or married to busty women. And I would further bet that they find the women in their lives attractive despite not conforming to their preferences in zombie-like computer models.)

    Third, the questions. I don’t have access to the study, but here are the sample questions they provided:

    Attitudes Toward Women Scale (sample prompt: ”Intoxication among women is worse than intoxication among men.”)

    Hostility Towards Women Scale (sample prompt: ”I feel that many times women flirt with men just to tease them or hurt them.”)

    Benevolent Sexism subscale of the Ambivalent Sexism Inventory (sample prompt: “Women, as compared to men, tend to have a more refined sense of culture and good taste.”)

    Whoa, really? Those are your sample prompts? Those three prompts are all judgements. You would probably find lots of women who would agree with at least a couple of those. You would probably find that a man would agree or disagree based on his emotional state (if he’s just had a bad break-up, for example). And prompt three (and many of the questions on Ambivolet Sexism Inventory from which they are taken) aren’t clearly sexist. Many of even the most blatant ones probably probe misanthropy far more than they probe misogyny specifically.**

    (Another aside: the Atlantic author illustrates sexism by quoting a lawsuit in which a boss constantly commented on a co-worker’s breasts and once shook her breast as a substitute for shaking her hand. This is not the behavior of a man who likes big breasts or thinks women have a more refined sense of cultural taste. This is the behavior of a sociopath.)

    But I think the real flaw is highlighted by Ann Althouse:

    They were taking a science-y survey, so deference to authority and desire to be socially acceptable would be an influence along with real-world sexual preference.

    …

    The scientists found “men who more strongly endorsed benevolently sexist attitudes toward women, who more strongly objectified women, and who were more hostile toward women idealized a large female breast size.” Were these men really the ones who “idealized a large female breast size,” or were they simply the ones who didn’t feel as strongly compelled to moderate their opinions to conform to the perceived demands of polite society?

    Exactly. I keep harping on this in the social sciences: there is a huge difference between what people think and do and what they tell a group of leering scientists that they think and do. Most people do not want to be perceived as abnormal (or sexist). This is a big problem with this study since, if I read it correctly, the men were shown all five images at the same time. This creates a very obvious social pressure that is different from if five groups of men were shown five different images separately. Hell, if I were put in a room and asked which image I liked, I might say 3 or 4 even though I would prefer 4 or 5 (and would actually prefer a real women with real physical proportions).

    How would I improve this “not to be outdone” survey? First of all, I would have a lot more than 361 white British men. Second, I would show each man only one image and ask him to rate her on a scale of 1-10. Second, I would get images of real women and digitally alter them, using some statistical model based on women’s actual bust sizes. Third, I would make a second axis by having some women altered to have both bigger hips and bigger breasts and others to just have bigger breasts. Breast size and hip size are correlated, as anyone who has seen real women instead of 3-D models knows. Fourth, I would use something a little less ambiguous than these prompts. For example, I might give the men two different job applications and just change the gender and see how they rated the applicant. Or have some people enact a job situation and ask them what they thought of the woman’s behavior. Something a little more direct, at any rate.

    Or I might go to the gigantic database compiled by the authors of A Billion Wicked Thoughts who gathered data from Google when men didn’t know they were being studied. The only problem is that I would probably find — as those researchers did — that men actually prefer curvy women, not just just busty ones. And that would ruin my thesis that a preference for big boobs is a results of sexism.

    So, let’s sum up: a small and poorly designed study asked men to look at unrealistic images of women. They were then asked leading questions of dubious utility. And from this, we conclude that men who like big boobs are more likely to be hostile to women and that feminist theory is vindicated.

    That makes me feel some hostility all right. But it’s not directed against women.

    **Update: Michael Talarski alerted me that there are links to the questions in the Atlantic article. Here is the attitude toward women quiz. The other triggers a download. The questions are mostly reasonable probes of attitudes toward women (although a few are bit ambiguous). But I would be curious to see how women score on that test. And I would be especially curious to see if these attitudes correlate with actual behavior.

    Science and Edumacation

    An Owl in A Lark World

    This article, about sleep, has been particularly relevant to me lately. Since returning from Australia, I’ve been struggling to sleep. It reached an awful nadir the past weekend when I was able to get only about two hours. Since then, I’ve been rebuilding things with better sleep hygiene (i.e., turning the computer off no later than 10:30) and was able to get five straight hours last night, which was a huge relief.

    What jumped out at me was this, which is relevant to my perennial struggles with sleep:

    Each of us has an internal clock, or, to use Roenneberg’s term, a “chronotype.” Either we’re inclined to go to bed early and wake up at dawn, in which case we’re “larks,” or we like to stay up late and get up later, which makes us “owls.” (One’s chronotype seems to be largely inherited, although Roenneberg notes, not altogether helpfully, that the “genetics are complex.”) During the week, everyone is expected to get to the office more or less at the same time—let’s say 9 a.m. This suits larks just fine. Owls know they ought to go to bed at a reasonable time, but they can’t—they’re owls. So they end up having to get up one, two, or, in extreme cases, three hours earlier than their internal clock would dictate. This is what Roenneberg refers to as “social jet lag”—each workday, owls fall asleep in one time zone and, in effect, wake up in another. By the time the week is over, they’re exhausted. They “fly back” to their internal time zone on weekends and sleep in on Saturday and Sunday. Then, on Monday, they start the process all over again.

    For larks, the problem is reversed. Social life is arranged so that it’s hard to have one unless you stay out late on Friday and Saturday nights. But, even when larks have partied till 3 a.m., they can’t sleep in the following day—they’re larks. So they stagger through until Monday, when they can finally get some rest.

    The moral equivalence here is staggering. First of all, the problem for “larks” is non-existent for most people. If you have a family or are past the age of 30, it’s rare to stay up partying late on weekends. But the problem for “owls” never ends. No matter what age you are, you are expected to be at work at 9 am or earlier.

    The simple fact is that the larks set the rules for the rest of us. And moreover, they cast their larkness as a sign of their virtue and industry (see Franklin, Ben). Those of us who are owls are seen as lazy sluggards. And this prejudice is only strengthened by our schools, government and military setting lark schedules (an especially odious practice in schools where, as the article notes, children are biologically prone to be owls but forced to live on adult lark schedules).

    But, in a way, I’m being too harsh on the larks. The problem is partially them but also our insistance, as a society, on conformity. Everyone has to go to work at the same time, everyone has to come home at the same time. This makes some sense — businesses have to be open simultaneously to interact. But we carry it to a ridiculous extreme. It manifests not just in the owl-lark problem but in the absurdity of Daylight Savings Time (it would make far more sense for businesses to adjust their hours to the season on an individual basis, rather than forcing uniformity on all of us; astronomers understand this).

    Cool Stuff, Humor, Politics, Science and Edumacation

    Caloundra Linkorama

    I just noticed I have about five Linkoramas lingering in my queue. So I’ll take out whole bunch here.

  • DARPA is looking into recycling satellites. This makes a huge amount of sense if it can be done. Space debris is a big problem. And the launch is one of the biggest expense of any mission. If you could put something up there cheap that could rove around and repair satellites, it would be worth a fortune.
  • Cracked has a nice article about how poverty isn’t the cliche we like to think it is.
  • An interview with James Alan Fox disputing Mother Jones on mass shootings.
  • This is an amazing story about how a family was cut off from civilization for 40 years. A modern-day Swiss Family Robinson.
  • I love this depiction of what Mars would look like with water. In actuality, it wouldn’t look quite like that, since erosion would wear down the extreme features.
  • I also love this depiction of what Cambrian creatures might have looked like.
  • When you make a little girl in a wheelchair cry that she doesn’t want to go to Disney World, you are slime.
  • Nine hilarious NYT corrections. I mean, even I knew the My Little Pony one.
  • Anatomy of a drug panic.
  • Anatomy of a female orgasm.
    • 'Culture', Science and Edumacation

    Mike’s Rule of Expertise

    Shortly after I graduated from college, I was on a kick to try to get healthy and lose weight. It still hasn’t worked, 19 years la- … holy crap, 19 years?! … let me see … 1994 .. good God, I’m old … anyway, it still hasn’t worked 19 year later.

    At one point, I tried Herbalife. This was not something I came to of my own accord. A friend’s husband was into it on the lowest tier of their multi-level marketing. I was too young and stupid to know just how idiotic herbal supplements were, so I figured “what the hell” and jumped.

    It was a big mistake. The compound contained ephedra and it caused my first incident of Premature Ventricular Contractions — a common harmless arrhythmia that nevertheless is scary as hell. Some time later I tried a prescription weight loss pill that also caused PVC’s. They went away after I stopped, mostly. I still get them occasionally, most notably right after my wedding and when I haven’t been getting enough sleep. I had a full cardio workup six years ago and everything looks fine. But I still wonder if the ephedra did any permanent damage.

    The thing is that I’m not normally into that sort of thing. But it was sold to me because I wasn’t terribly familiar with high-pressure marketing techniques and certainly didn’t expect them from a friend’s husband. I’ve since … well not wised up, exactly. I’ve gotten confident enough to tell people to fuck off. In fact, high pressure sales pitches are the surest way to drive me away. When we bought our first home, I literally walked out on people who tried to get me to buy right then with “if you buy right now” incentives. The home we bought was sold in a low-pressure way. We felt — correctly as it happened — that this reflected the salesman’s confidence in his product.

    I’m rambling. Let me get to the point. Part of the sales pitch I got for Herbalife went like this:

    Mike, I’m telling you, I’ve investigated all kinds of supplements. I’ve looked into everything. And I’ve researched this product really thoroughly. I wouldn’t take anything I didn’t know everything about. So trust me: this is the real deal.

    Standard stuff, right? But hidden within that is something I’ve come to recognize as the mark of a shyster. If someone spends an inordinate amount of time telling you, in a vague sense, how much experience they have and how much expertise they have and how they’ve really researched this and they’ve looked at everything out there, they are, to be blunt, full of shit.

    This instinct has served me well. When Neal Boortz began flogging the Fair Tax, he talked about how much research had been done and how he’d looked at every plan out there (really? every plan?). That pinged my radar and I did some research and found out that the Fair Tax had giant gaping problems (documented here). When a contractor came by and gave me a pitch about how he’d tried everything and he was the best expert, I went with someone else.

    And you see this constantly in the alternative medicine crowd. Sellers and promoters will constantly tell you how extensively they’ve surveyed things, how much research they’ve done, how much experience they have and, inevitably, it turns out not to be the case.

    So, in my roundabout way, here is Mike’s Rule of Expertise: Experts don’t constantly reassure you of their expertise; they simply dole out facts and data.

    Let cite some good examples from my blogroll: Radley Balko doesn’t talk about what an expert he is on criminal justice matters; he tells you specifically what he’s learned, seen and read. The Bad Astronomer doesn’t talk about how much experience he has in astrophysics; he points you at research and researchers who’ve done the work. Maggie McNeill doesn’t pontificate about her extensive background in the sex industry; she links every study and opinion piece she can find. Joe Posnanski doesn’t talk about how many athletes he’s interviewed or how much Bill James likes him; he crunches the numbers, gets the quotes and presents the facts.

    I’ve been to hundreds of science talks. Not one has centered around the speaker’s credentials and how they’ve explored every alternate theory. They present hypothesis, data and conclusion. The best ones acknowledge their limitations and possible alternate theories. The kind of dead certainty you will encounter in, say, a homeopathy practitioner, is minimal in any good scientist and absent in the best ones.

    This is how real experts do it. Experts want you to trust the facts; con men want you to trust them.

    (In a related note, I, like most astronomers, rarely affix “Ph.D.” to the end of my name unless I’m applying for a grant where the credential is required. I also only refer to myself as “Dr. Siegel” when yelling at the cable company. And the only time I’m called that at work is either as part of a running gag or when being addressed formally (grant correspondence, for example; and I usually encourage them to call me Mike). This is partially because astronomers are an informal bunch. It is also related to my time at UVa, where everyone except Ed School professors and medical doctors takes the moniker of “Mr.” and “Ms.” as a sign of respect to Mr. Jefferson.

    But I also I think this flows from the same skepticism of over-credentialing. A real scientist wants you to trust the data, not them. The only academics I know who use the Ph.D. suffix or the Doctor prefix are either a) pretentious; b) medical doctors, where I think it’s appropriate, and c) women or minorities in disciplines where they have trouble being taken seriously and it’s hard to begrudge them. And anyone who refers to themselves as “Dr. Smith, Ph.D.” is almost certainly full of it.)

    What brought this to my frontal lobe was a re-eruption (a few months ago now) of controversy over Sex at Dawn. I find the premise of Sex at Dawn — that humans are naturally polyamorous — interesting if flawed. But what has long bothered me is the certainty with which this supposedly scientific premise is discussed. Every time I hear Christopher Ryan speak, I feel like he’s about to sell me herbal supplements. He’s not quite as bad as my friend’s now ex-husband. He actually does know some stuff. But he seems stunningly unaware of what he doesn’t know or of what facts are inconsistent with his thesis. Is he right? Dammit, if this comes down to me reading his book, I give up.

    Anyway, there is some controversy over Christopher Ryan’s credentials. I took a look at his wikipedia page and this is what I found:

    He received a BA in English and American literature in 1984 and an MA and Ph.D. in psychology from Saybrook University, in San Francisco, CA twenty years later. He spent the intervening decades traveling around the world, living in unexpected places working odd jobs (e.g., gutting salmon in Alaska, teaching English to prostitutes in Bangkok and self-defense to land-reform activists in Mexico, managing commercial real-estate in New York’s Diamond District, helping Spanish physicians publish their research). Drawing upon his multi-cultural experience, Ryan’s academic research focused on trying to distinguish the human from the cultural. His doctoral dissertation analyzes the prehistoric roots of human sexuality, and was guided by the psychologist, Stanley Krippner.

    Ryan has guest lectured at the University of Barcelona Medical School, consulted at various hospitals, contributed to publications ranging from Behavioral and Brain Sciences (Cambridge University Press) to a textbook used in medical schools and teaching hospitals throughout Spain and Latin America and makes frequent mass media appearances. Ryan contributes to both Psychology Today and Huffington Post.[

    I read that and I heard, “I’m telling you, I’ve been all over the world and met all kinds of people and read all the papers. And this polyamory thing; this is the real deal.” Maybe Ryan is right. I’ve got an 80-book backlog right now, but I’m hoping to get to his at some point. But a Wikipedia entry filled with such a wide array of credentials combined with his “I’m such an expert” public statements make me suspect the work has flaws. And what I’ve read indicates this perception is correct. If and when I get to his book, I’ll know for sure.

    (I wrote the above a couple of months ago. When I went to it today, I was reminded of a recent post at Popehat that mocked a legal spammer for doing the same thing: talking himself up as some modern-day renaissance man. Ken has a lot more experience in dealing with shyster lawyers, obviously. His approach to this is different because he gets a lot of legal spamming. But the basic tenet is the same: a real hot shot lawyer doesn’t try to wow you with his credentials.)

    Cool Stuff, Movies, Science and Edumacation

    Thursday Linkorama

    I think I’ve spent the entirety of this week either on the phone or having a meeting or curled up in bed with a migraine. Sigh. Some weeks are like that.

  • I can’t say that I enjoy the retuning of some songs to different keys, per se. I do, however, find it utterly fascinating how important key is to the mood and feel of a song or musical piece. I knew a woman back in college who had a variety of health issues that would eventually take her at a young age. But she was an amazing pianist who could shift the key on a song instantly and play it perfectly. Somehow, it never changed the tone like these retunings do.
  • Cracked looks at lines censored by TV. My brother and I used to get great amusement from watching movies like The Breakfast Club and Police Academy on Channel 46. The dubbing was so bad and the lines so hilariously stupid, we almost preferred them. My favorite comes from Police Academy: “Mahoney …. nobody plays with me.” with “plays” delivered about an octave and a half lower than Bailey’s register.
  • This article, which tries to argue that Southern dominance of Miss America is a result of racism, is so idiotic, so filled with PC bullshit and is such an inaccurate assessment of Southern history, culture and tradition, that it could only possibly have been published in the New York Times.
  • Eerie pictures of Chernobyl and amazing pictures of World War I.
  • Jacob Sullum details some of the concerns about allowing the CDC to do research into guns. I’m in favor of lifting restrictions on scientific research, even if it does mean politicized work. I just hate restrictions too much. But it is worth noting that the public health experts have a bad history of cooking the books to reach their conclusions, as seen in the EPA’s study of second-hand smoke and the CDC’s own study of obesity deaths.
  • A woman drives 900 miles out of her way and through several countries due to a supposed GPS error. Maybe it’s me, but I doubt the GPS was the only malfunctioning thing in that car.
  • An environmentalist admits he was wrong on GMO’s. Thanks a lot.
  • How much do you want to bet that most of the people involved in these idiocies were not fired?
  • I can’t vouch for the accuracy, but if these people really have recreated a hairstyle from the Roman Empire, that’s pretty damned cool.
    • Science and Edumacation

    Guess Who, Fat Boy?

    Earlier this week, the Journal of the American Medical Association came out with a huge study of obesity that concludes that the obesity hysterics are, indeed, hysterical. Their results indicate that being moderately overweight or even very mildly obese doesn’t make you more likely to die than a thin person. In fact, it may make you less likely to die, to the tune of 6%. (Severe obesity, however, did show a strong connection to higher death rates).

    Now you would think that this would be greeted with some skeptical enthusiasm. If the results are born out by further study, it would mean we do not have a massive pending public health crisis on our hands. It means that instead of using cattle prods to get moderately overweight people into the gym, we can concentrate on really obese people.

    So is the health community greeting this with relief? Not exactly:

    That’s the wrong conclusion, according to epidemiologists. They insist that, in general, excess weight is dangerous. But then they have to explain why the mortality-to-weight correlation runs the wrong way. The result is a messy, collective scramble for excuses and explanations that can make the new data fit the old ideas.

    William Saletan at Slate lists a dozen different explanations for why this study is wrong, definitely wrong, absolutely wrong, no sir. Most of these cross him (and me) as trying to rationalize away an inconvenient scientific result.

    Continue reading Guess Who, Fat Boy? →

    Politics, Science and Edumacation

    Post-Xmas Linkorama

  • Godspeed.
  • Heh heh. It turns out that some of those tests that say newborns have pot in their systems may be bullshit. Don’t you just love the War on Drugs?
  • You know, I actually think this guy gets it right. The whole “we’re miserable during the holidays” things always did cross me as a load of dingo’s kidneys. We see the stress of family and travel; ignore the absent stress of work.
  • As much as I respect the idea of building an ideal language, the idea is going precisely nowhere as Zamenhoff found out. Language is not about utilitarian efficiency. It’s about culture, history, nuance and tradition.
  • One thing I wondered while taking Sporcle’s blurred faces quiz is if the results would show a racial component: i.e., would white people be more likely to recognize the blurred features of other white people. This wouldn’t be about racism but about the way our brains process facial features.
    • Science and Edumacation

    Robot Cars and the Law

    As I often say about innovation, the technical problems are nothing compared to the pinhead legal problems. Verge has a good article up sorting through some of the legal and treaty issues (yes, treaty issues) involved in automated robotic cars. It’s definitely worth your time.

    However…

    The article seems unduly pessimistic to me. These are things that can be worked out — we have entire armies of lawyers in this country who stand to make millions getting everything sorted into legal precedent. And if these things prove to be safe — and I think they will — the economic pressure to work out the legal issues will be fierce.

    The one thing that bothered me about the article was this:

    The Geneva Convention on Road Traffic (1949) requires that drivers “shall at all times be able to control their vehicles,” and provisions against reckless driving usually require “the conscious and intentional operation of a motor vehicle.” Some of that is simple semantics, but other concerns are harder to dismiss. After a crash, drivers are legally obligated to stop and help the injured — a difficult task if there’s no one in the car.

    As a result, most experts predict drivers will be legally required to have a person in the car at all times, ready to take over if the automatic system fails. If they’re right, the self-parking car may never be legal.

    Did you see the subtext? The subtext is that if I’m in a crash with an automated car, there is no one around to render assistance to me.

    Well, maybe. Bleeding out while unconscious or seriously injured would be a risk (although it’s not like pedestrians and bystanders are going to disappear). But being in a collision with a robot would have some advantages over being in one with a human:

  • One of the lessons taught in driver’s education is how to avoid accidents or, if unavoidable, minimize the damage (e.g., rear-ending someone instead of swerving into traffic or pedestrians). Robots can be made to optimize this much better than human beings.
  • A robot can not be knocked unconscious and can call for help. Even if its CPU were destroyed, it can be on a network that will recognize the dropout and call for assistance to the last known location.
  • An automated car will maintain an extremely detailed and objective record of the accident, making fault easy to determine.
  • An automated car will not get out and try to help injured passengers, true. But this isn’t always a good thing. It’s not unheard for helpful bystanders to drag people with spinal injuries into para- or quadriplegia because of an irrational fear that the car will burst into flames.
  • Developing safety and reporting methods for automated cars will massively improve the ability of driven cars to avoid accidents, minimize damage and call for help.

    • Robot cars are coming, one way or another. As powerful as the legal pinheads are, the force of progress is simply too strong.

    'Culture', Deep Thoughts, Politics, Religion, Science and Edumacation

    Texas Linkorama

  • The idea of building gondolas in Austin strikes me as a really dumb. Gondols are slow and would take up lots of space for the number of passengers they transport. Texans aren’t big on mass transit to begin with (the light rail system is likely to be a flop). And what do you need a gondola for in a city that is really flat? This crosses me as a solution in search of a problem. And if it doesn’t have high ridership, it’s bad for the environment. And expensive.
  • Down with homework!
  • I always suspected that the high I got off parenting was an evolutionary thing. I find these things intriguing and fascinating. Much of what we feel in life: compassion, empathy, love, tenderness is the result of millions of years of evolution making us into creatures that look for the species rather than ourselves.
  • A really good post on the Jefferson slave thing. Also, highly recommended on the subject: Ta-Nehisi Coates. Actually, TNC is just recommended, full stop.
  • One day, parenting authorities will get it through thick skulls like that fun physical activities are good for children even when they involve a low amount of risk.
  • Ah, peak oil. These days, the biggest energy concern is that we won’t run out of fossil fuels and that global warming will be worse than feared.
  • A fascinating story from NPR about how our image of Jesus has changed with social norms.
  • While it strikes me that global helium supplies are a legitimate concern, the idea that our technical needs in 50 years will be the same as they are now crosses me as silly. Think about the chemicals that were important 50 years ago. Are we in the grips of a global lead shortage?
    • Science and Edumacation

    Mathematical Malpractice Watch: Weather Fatalities

    This came to my attention a month ago. I drafted a post, forgot about it in the election/migraine event horizon but now want to get it out my drafts section. I think it’s worth posting because we are likely to hear more of this from the more hysterical environmental wing.

    The chart, from Ezra Klein’s usually excellent Wonkblog, purports to show a steep rise in weather-related fatalities in recent years.

    It doesn’t show anything of the kind.

    First of all, what it shows is a slight decline or flat trend with a few recent spikes caused by a 90’s heat wave, Hurricane Katrina and last year’s tornados. Now maybe you can argue that we should pay more attention to these in the era of global warming because they may be related (or may not). I agree. However, the long term trend in almost all categories is down — way down. Deaths from lightning strikes are down by over two-thirds over the last 70 years. That’s real progress.

    But the progress is even better than the graph shows. The graph makes a huge blindingly obvious error; one that Klein’s readers jumped on immediately: it does not account for population growth. The first data point is from a sample of 140 million people while the last if from a sample of 310 million. To compare raw figures is simply ridiculous (and, indeed, Klein’s co-blogger later tweeted a version with death rates that was far less dire and showed dramatic declines in weather-related fatalities).

    The third problem is less obvious but potentially the worst one. The plot includes deaths from heat, cold, “winter fatalities”, rip currents and wind. Heat deaths are particularly important to the point Wonkblog is making since, presumably, global warming will result in more deaths from heat waves and drought.

    The problem is that the NOAA, from whose data the graph is taken, did not track heat deaths until 1986. The same goes for many deaths in the “other” category. Cold fatalities were not tracked until 1988. Winter fatalities until 1986. Rip currents until 2002. Wind deaths until 1995. No correction, none whatsover, is made for the incomplete data that spans the first five or six decades of NOAA’s sample.

    It is simply not sensible to treat the data as though there were zero deaths from heat and other categories before the mid-1980’s. In fact, there are many reasons — the spread of air-conditioning for example — to suspect that heat-related deaths were much much higher in the past. It would defy common sense for the sharp reductions in fatalities from tornados, hurricanes and lightning (not to mention earthquakes) to not reflected in the statistics for other weather-related deaths.

    But let’s not assume. Let’s go to the record. The data start in 1940, which usefully omits one of the greatest environmental calamities in American history: the Dust Bowl. Thousands died; at least 5000 in one 1936 heat wave alone. Another massive drought hit in the 1950’s. A 1972 heat wave killed 900 people. A 1980 heat wave killed 1700 people. All of those happened before the NOAA tracked the number of heat-related deaths. None are in the sample.

    To be completely honest, the NOAA data seems a poor resource for this kind of study. It apparently does not include the 1988 drought, recording only 47 heat-related deaths in that two-year period. But it does include the 1995 and 1999 heat waves. I have no idea what their criteria are. I suspect they are counting deaths from specific short-term heat waves rather than broad massive events like the 88-89 drought. That’s fine as far as it goes. But if your attempt to quantify long-term trends in weather-related deaths ignores droughts; if it ignores the God-damned Dust Bowl, I would submit that you are looking at the wrong data.

    So, in the end, the claim that we are getting more weather-related fatalities than ever is, at least in this case, based on a heavily biased poorly understood sample that barely supports the conclusion

    Cool Stuff, Law and Order, Politics, Science and Edumacation

    Saturday Linkorama

  • A great letter on the situation at Penn State, from the former Paterno Chair.
  • This article, sent to me by several, argues that China will be a benevolent world power. I found it ludicrous. not only do I not think China will become a dominant world power (there are still massive areas of abject poverty and they are aging too fast); I find the historical analysis from this sinophile to be absurdly optimistic about what they would do with power.
  • Color photos of Nazi-occupied Poland.
  • Heart-rending notes pinned to abandoned babies.
  • This article, about Chris Christie and Bruce Springsteen, came out this summer. But I found it amusing and kind of touching.
  • This story, about the explosion of solitary confinement in this country, is a must-read.
  • I knew that music has sucked since the 1980’s (#1). #5 is one we explore in Music Theory class.